Issue #3399745 by sekinet, yas: Fix the OpenStack router create form to show availability zones

modules/cloud_service_providers/openstack/src/Controller/ApiController.php

@@ -1639,6 +1639,9 @@ class ApiController extends CloudApiControllerBase implements ApiControllerInter
       $params['zone_resource'] = $zone_resource;
     }
 
+    $this->openStackService->setCloudContext($cloud_context);
+    $this->openStackService->updateAvailabilityZonesWithoutBatch();
+
     $availability_zones = $this->entityTypeManager
       ->getStorage('openstack_availability_zone')
       ->loadByProperties($params);